Kashrus Halacha
Rabbi Dovid Cohen
Laws of kosher as they apply in contemporary times, taught by Rabbi Dovid Cohen of cRc Kosher.
Shiurim
- Rotzeh B'kiyumo (Pesach #30)
Rabbi Dovid Cohen
Rotzeh B'kiyumo
- Pesach Q&A 5781 (Pesach #40)
Rabbi Dovid Cohen
Medicine Soft matzah Bake your own matzah CBD / marijuana Antacids Kashering with a steamer Toothpaste, mouthwash, & lipstick
- Yad Soledes Bo (Bitul and Blios #50 - Shulchan Aruch YD 105:2)
Rabbi Dovid Cohen
Yad Soledes Bo: Heat vs. Temperature; Shiurim from Poskim - low end, high end. See seforim by Rabbi Cohen at www.kashrushalacha.com
- Broccoli Kugel (Halachos of Insects #32 - Shulchan Aruch 84:14)
Rabbi Dovid Cohen
Broccoli Kugel Buy the book at www.kashrushalacha.com
- Raspberries & Blackberries (Halachos of Insects #21 - Shulchan Aruch 84:9)
Rabbi Dovid Cohen
Raspberries & Blackberries Frozen vs. fresh Finding insects Chiyuv bedikah on frozen berries Buy the book at www.kashrushalacha.com
- Spray Dryers (Kashering #10 - Shulchan Aruch 451:4)
Rabbi Dovid Cohen
Spray Dryers
- Kilayim [Part 2] (Kosher Anthology 27)
Rabbi Dovid Cohen
Kilayim [Part 2]: Keeping a kilayim tree; Bracha on blossoming tree; Shehechiyanu on Rosh Hashanah; Microbial fermentation. See seforim by Rabbi Cohen at www.kashrushalacha.com
- Urns (Q&A #7)
Rabbi Dovid Cohen
Urns. See seforim by Rabbi Cohen at www.kashrushalacha.com
- Warming Food on Shabbos (Kosher Anthology 7)
Rabbi Dovid Cohen
Warming Food on Shabbos: Hot box; Hot plate (plata); Empty pan; Non-Jews; Shabbos Chef. See seforim by Rabbi Cohen at www.kashrushalacha.com
- Milk Powder and Acid Casein (Kosher Dairy #20 - Shulchan Aruch 115:3)
Rabbi Dovid Cohen
Milk Powder & Acid Casein
- Bitul Issur L'chatchilah (Bitul and Blios #33 - Shulchan Aruch YD 99:5-6)
Rabbi Dovid Cohen
Bitul Issur L'chatchilah Which foods - heter, rennet, maris ayin, safek, ingredient; Non-food issues - puree, pegimah, remove issur, aino ben yomo; Which people - manufacturer, hashgachah, choice, machmir; Ain kavonoso levatel - classic, k'
- Seriousness of Bishul Akum (Kosher Classes #44)
Rabbi Dovid Cohen
Seriousness of Bishul Akum
- Methods of Food Preparation [Part 1] (Bishul Yisroel #32 - Shulchan Aruch 113:13)
Rabbi Dovid Cohen
Methods of Food Preparation [Part 1] Brining Pickling Smoking Buy the book at www.kashrushalacha.com
- Edible Raw (Kosher Anthology 23)
Rabbi Dovid Cohen
Edible Raw (Bishul Akum) : Milk; Corn; Cranberries; Maple Syrup; Mushrooms; Chestnuts; Fish (sushi). See seforim by Rabbi Cohen at www.kashrushalacha.com
- Whisky (Kosher Classes #1)
Rabbi Dovid Cohen
Whiskey
- High School Q&A 2025 (Kosher Classes 71)
Rabbi Dovid Cohen
High School Q&A 2025: Vaping; Dairy and DE; Drinks; Hechsherim. See seforim by Rabbi Cohen at www.kashrushalacha.com
- Foods That Require Bishul Yisroel (Hashgachah Practicum #6 - Bishul Yisroel A)
Rabbi Dovid Cohen
Foods That Require Bishul Yisroel Pas vs. Tavshil; Edible raw (נאכל חי) (with other foods, passably edible, prefer it cooked); Oleh al shulchan melachim (עולה על שולחן מלכים) (definition, if prepared differently, egg) Beets, cake, cereal, c
- Surgical Procedures (Meat and Poultry 3 - Livestock C)
Rabbi Dovid Cohen
Surgical Procedures - Drawing blood - Capon chicken - Cannulated cow - Ruminal tympany (bloat) - Displaced abomasum Video at https://kshr.us/Surgical
- Shiur of Ma'achal Ben Drusai (Bishul Yisroel #27 - Shulchan Aruch 113:8)
Rabbi Dovid Cohen
Shiur of Ma'achal Ben Drusai Non-Jew Removed Food From Fire Buy the book at www.kashrushalacha.com
- Port Wine (Alcoholic Beverages #32 - 123:5)
Rabbi Dovid Cohen
Port Wine Buy the book at www.kashrushalacha.com
- Grape Juice at the Seder [Part 2] (Pesach #8)
Rabbi Dovid Cohen
Grape Juice at the Seder [Part 2]
- Shiur Challah (Hafrashas Challah #6 - Shulchan Aruch 324:1)
Rabbi Dovid Cohen
Shiur Challah Tzlach's question Size of Eggs & Etzbo'os Practical Halacha and Shiurim
- Even M'lubenes (Kashering #26 - Shulchan Aruch 451:16)
Rabbi Dovid Cohen
Even m'lubenes
- Five Grains [Part 2] (Kosher Anthology 21)
Rabbi Dovid Cohen
Five Grains - Part 2): Ma'asei Kedairah; Bran removed; Stuck together (Rambam, Rabbeinu Yonah); Pearled barley; Farro; Granola Bars. See seforim by Rabbi Cohen at www.kashrushalacha.com
- Davar Sheyesh Lo Matirim (Kosher Classes #36)
Rabbi Dovid Cohen
Davar sheyesh lo matirim Yoshon (malt, milling) Shemittah Chazusah Insects (broccoli, orange juice) Tevillas keilim Chametz
- Chips (Q&A 75)
Rabbi Dovid Cohen
Chips See seforim by Rabbi Cohen at www.kashrushalacha.com
- Kashering (Q&A 95)
Rabbi Dovid Cohen
Kashering See seforim by Rabbi Cohen at www.kashrushalacha.com
- Liquid Eggs (Eggs #10 - 86:10)
Rabbi Dovid Cohen
Liquid Egg - Gemara - Nowadays - Liquid eggs
- Color (Q&A 38)
Rabbi Dovid Cohen
Color See seforim by Rabbi Cohen at www.kashrushalacha.com
- Kashering Shorts [Part 1] (Kosher Anthology 18)
Rabbi Dovid Cohen
Kashering Shorts: Corelle (absorption, tevillah); Milui v'irui on Shabbos; Chafing dish food pans; Countertops. See seforim by Rabbi Cohen at www.kashrushalacha.com
- B'lios of Pas Akum (Pas Yisroel #15 - Shulchan Aruch 112:15)
Rabbi Dovid Cohen
B'lios of Pas Akum Buy the book at www.kashrushalacha.com
- Safek Issur Mashehu (Pesach #42)
Rabbi Dovid Cohen
Safek Issur Mashehu; Rice Cereal for infants on Pesach; איסור משהו; נתקבעו; יבש ביבש; סכין; ירדו גשמים See Rabbi Cohen's seforim at www.kashrushalacha.com
- Introduction to Nikkur (Meat and Poultry #19 - Nikkur A)
Rabbi Dovid Cohen
Introduction to Nikkur Four reasons to perform nikkur Nikkur achorayim (hindquarters) Contemporary nikkur (10 parts) 5739 incident Bonus content - Rav Belsky shows the gid hanasheh Video available at https://kshr.us/NikkurIntro
- Kilayim [Part 1] (Kosher Anthology 26)
Rabbi Dovid Cohen
Kilayim: Basics; Species/Minim; Shehechiyanu; Grafting vs Crossbreeding. See seforim by Rabbi Cohen at www.kashrushalacha.com
- Hotel Kashering (Hashgachah Practicum #40 - Kashering C)
Rabbi Dovid Cohen
Hotel Kashering: Safety; Flat top (griddle); Tilt skillet (brazier); Steam kettle; Vegetable steamer; Hot box. See seforim by Rabbi Cohen at www.kashrushalacha.com
- Ribs (Meat and Poultry #21 - Nikkur C)
Rabbi Dovid Cohen
Ribs: Differences between Eretz Yisroel and United States Chutei D'kafli (חוטי דכפלי) Intercostal nerves on 11th, 12th, 13th ribs Rib eye Nodah B'yehudah / Chasam Sofer Fat around rib eye, teraifah finger, along bone, 12th vertebrae Video o
- 10 Animals [Part 5] (Kosher Anthology 35)
Rabbi Dovid Cohen
10 Animals [Part 5]: Identifying Chayos; Domestication; Wild beheimos; Horn types; Halachic differences. See seforim by Rabbi Cohen at www.kashrushalacha.com
- Play-Doh on Pesach [Part 2] (Pesach #19)
Rabbi Dovid Cohen
Play-doh on Pesach (part 2) Nuksheh Yichdo l'yeshiva
- High School Kosher Q&A [Part 1] (Kosher Classes #60)
Rabbi Dovid Cohen
High School Q&A [Part 1]: Meat and milk; Saltshaker; D and DE; Hard cheese; Pareve in a meat pot; Dairy spoon in meat drawer; Shechitos; Beverages See seforim by Rabbi Cohen at www.kashrushalacha.com
- Flour From Different Years [Part 2] (Hafrashas Challah #10 - Shulchan Aruch 324:8)
Rabbi Dovid Cohen
Flour from Different Years (Part 2) Blended flour
- Higdil Haissur Midaso (Bitul and Blios #43 - Shulchan Aruch YD 103:2)
Rabbi Dovid Cohen
Higdil Ha'Issur Midaso (הגדיל האיסור מדתו) : Nutramigen (whose taste, kashering); Carmine Manufacturer (b'lios, inedible). See seforim by Rabbi Cohen at www.kashrushalacha.com
- Cooking in a Jew's House (Bishul Yisroel #22 - Shulchan Aruch 113:4)
Rabbi Dovid Cohen
Cooking in a Jew's house Pre-Shulchan Aruch Shulchan Aruch and afterwards Buy the book at www.kashrushalacha.com
- Atzis She'aino Nakuv (Halachos of Insects #10 - Shulchan Aruch 84:6)
Rabbi Dovid Cohen
Atzis she'aino nakuv Mushrooms Modern mushroom growing methods Hydroponically grown vegetables Safek issur Leaf miners Buy the book at www.kashrushalacha.com
- Davar Hama'amid (part 1) [Alcoholic Beverages #14 - Shulchan Aruch 114:6]
Rabbi Dovid Cohen
Davar Hama'amid (part 1) Four early sources; Exceptions; Examples Buy the book at www.kashrushalacha.com
- Kashering With Libun [Part 1] (Pesach #20)
Rabbi Dovid Cohen
Kashering with libun (part 1) Temperature
- Pas Bal HaBayis (Pas Yisroel #8 - Shulchan Aruch 112:8)
Rabbi Dovid Cohen
Pas Bal HaBayis Bishul Paltar Maharit Tzahalon Rav Moshe's Opinion Buy the book at www.kashrushalacha.com
- Glatt and Beis Yosef (Meat and Poultry 16 - Teraifos C)
Rabbi Dovid Cohen
Glatt and Beis Yosef Source Five methods of checking Primary standards Glatt Beis Yosef/Chalak Sephardim Non-glatt meat Video available at https://kshr.us/Glatt
- Other Elements of Kedushas Shevi'is (Shemittah #13 - Shemittah Produce B)
Rabbi Dovid Cohen
Other Elements of Kedushas Shevi'is - Keep in Eretz Yisroel - Sechorah - Biur Buy the book at www.kashrushalacha.com
- Vegetable oil from an animal/vegetable factory (Alcoholic Beverages #17 - 114:7)
Rabbi Dovid Cohen
Vegetable oil from an animal/vegetable factory - Two cases (A/V plant, transported overseas in ship hold) - Five Gemaros/Four Opinion - Shach - Deodorized Oil Buy the book at www.kashrushalacha.com
- Burning the Challah (Hafrashas Challah #3 - Shulchan Aruch 322:4-5)
Rabbi Dovid Cohen
Kezayis for hafrashah Burning the challah Separation and burning in the tevel-dough system
- Tevillas Keilim – Rules and Examples (Kosher Classes #41)
Rabbi Dovid Cohen
Tevillas Keilim – Rules and Examples
- Citrus Scale (Q&A #56)
Rabbi Dovid Cohen
Citrus Scale See seforim by Rabbi Cohen at www.kashrushalacha.com
- ChaNaN [Part 1 - Basic Halacha] (Bitul and Blios #4 - Shulchan Aruch YD 92:3-4)
Rabbi Dovid Cohen
Chatichah Na'aseis Neveilah (חנ"נ) [Part 1] Basic Halacha Basar b'chalav; Sha'ar issurim; Hefsed merubah (examples); Lach and yavesh (לח ביבש, לח בלח, יבש ביבש, powdered stabilizer blend); Safek issur (five opinions); Steam systems; Yedias
- Using Milk Which is not Chalav Yisroel (Kosher Dairy #4 - Shulchan Aruch 115:1)
Rabbi Dovid Cohen
Ne'emanus of a child Using milk which is not Chalav Yisroel Pri Chadash/Chasam Sofer Proofs No non-kosher animals in the city
- Food Contact (Klei Seudah - Part 1) (Tevillas Keilim #5 - Shulchan Aruch 120:4)
Rabbi Dovid Cohen
Food Contact (Klei Seudah – Part 1) Source Miinor separations (aluminum foil) Defining food contact (nut cracker) Unintentional contact (can opener) Covers Barbecue cover Toaster oven Crock pot ceramic base Buy the book at www.kashrushalach
- Kashrus Rulings From Rav Belsky (Kosher Classes #58)
Rabbi Dovid Cohen
Kashrus Rulings from Rav Belsky; Irreligious Jews and pas Yisroel; Miut hamatzui; Tevillas keilim for certified restaurants; Shemittah positions; Raisin juice; Maintaining tevel status; Checking for tzomas hagidin; Hindquarter nikkur; Farbe
- Creating Gevinas Yisroel [Part 1] (Kosher Dairy #15 - Shulchan Aruch 115:2)
Rabbi Dovid Cohen
Creating Gevinas Yisroel (Part 1) Rema and Shach Understanding the takanah
- Shabbos and Yom Tov (Tevillas Keilim #23 - Shulchan Aruch 120:16)
Rabbi Dovid Cohen
Shabbos and Yom Tov Tevillas keilim on Shabbos Give a present Muktzeh Buy the book at www.kashrushalacha.com
- High School Kosher Q&A [Part 3] (Kosher Classes #62)
Rabbi Dovid Cohen
High School Kosher Q&A - Part 3 - Chumros: Yoshon - why, trusting people; Chalav Yisroel - why, powdered milk; Pas yisroel; Bird breeds. See seforim by Rabbi Cohen at www.kashrushalacha.com
- Raisin Juice Concentrate (Alcoholic Beverages #35 - 123:11)
Rabbi Dovid Cohen
Raisin juice concentrate - Introduction - Raisin blows - Hamshachah - Time of bishul Buy the book at www.kashrushalacha.com